{"id":2743,"date":"2020-01-11T21:38:09","date_gmt":"2020-01-11T13:38:09","guid":{"rendered":"http:\/\/www.sniper97.cn\/?p=2743"},"modified":"2020-01-11T21:38:09","modified_gmt":"2020-01-11T13:38:09","slug":"%e3%80%90leetcode%e3%80%910005%e6%9c%80%e9%95%bf%e5%9b%9e%e6%96%87%e5%ad%97","status":"publish","type":"post","link":"http:\/\/www.sniper97.cn\/index.php\/note\/algorithm\/2743\/","title":{"rendered":"\u3010LeetCode\u30110005\u6700\u957f\u56de\u6587\u5b57"},"content":{"rendered":"\n<p><a href=\"https:\/\/leetcode-cn.com\/problems\/longest-palindromic-substring\">https:\/\/leetcode-cn.com\/problems\/longest-palindromic-substring<\/a><\/p>\n\n\n<p>\u4ee3\u7801:<\/p>\n\n\n<pre class=\"wp-block-preformatted\"># -*- coding:utf-8 -*-\nclass Solution(object):\n    def longestPalindrome(self, s):\n        <em>\"\"\"\n        <\/em><strong><em>:type<\/em><\/strong><em> s: str\n        <\/em><strong><em>:rtype<\/em><\/strong><em>: str\n        \"\"\"\n        <\/em># \u5de6\u53f3\u8d70\u7684\u957f\u5ea6\n        flag = 0\n        # \u56de\u6587\u5b57\u5f00\u59cb\u4f4d\u7f6e\n        start = 0\n        for i in range(len(s)):\n            # \u4ee5\u5f53\u524d\u4f4d\u7f6e\u4e3a\u4e2d\u5fc3\uff0c\u5de6\u53f3\u5404\u6269\u51451\u4f4d\n            if i - flag >= 1 and s[i - flag - 1:i + 2] == s[i - flag - 1:i + 2][::-1]:\n                start = i - flag - 1\n                flag += 2\n                continue\n            # \u4ee5\u5f53\u524d\u4f4d\u7f6e\u4e3a\u51c6\uff0c\u5411\u53f3\u6269\u5145\u4e00\u4f4d\n            if i - flag >= 0 and s[i - flag:i + 2] == s[i - flag:i + 2][::-1]:\n                start = i - flag\n                flag += 1\n        return s[start:start + flag + 1]\nif __name__ == '__main__':\n    # s = 'ccc'\n    # s = 'babab'\n    s = 'ababd'\n    print(Solution().longestPalindrome(s))\n<\/pre>\n\n\n<p><strong>\u601d\u8def\uff1a<\/strong>\u91c7\u7528\u8d2a\u5fc3\u7684\u601d\u60f3\uff0c\u4ece\u7b2c\u4e00\u4e2a\u5143\u7d20\u51fa\u53d1\uff0c\u5148\u5411\u5de6\u4e00\u4f4d\uff0c\u5411\u53f3\u4e00\u4f4d\u67e5\u770b\u4e24\u4e2a\u662f\u5426\u76f8\u7b49\uff0c\u5982\u679c\u76f8\u7b49\u90a3\u4e48\u8bf4\u660e\u56de\u6587\u5b57\u957f\u5ea6\u53ef\u4ee5+2\uff0c\u5982\u679c\u4e0d\u76f8\u7b49\uff0c\u5219\u5411\u53f3\u4e00\u4f4d\u5224\u65ad\u662f\u5426\u548c\u5f53\u524d\u4f4d\u7f6e\u76f8\u7b49\uff08\u8fd9\u91cc\u4f18\u5148\u9009\u62e9\u4e86\u8f83\u957f\u7684+2\uff0c\u5982\u679c\u6ee1\u8db3\u5219\u4e0d\u8fdb\u884c\u5411\u53f3\u4e00\u4f4d\u5224\u65ad\uff09\u3002<\/p>\n\n\n<p>\u6bcf\u8fdb\u884c\u4e00\u6b21\u8fed\u4ee3\u90fd\u9009\u62e9\u5f53\u524d\u7d22\u5f15\u4e0b\u6700\u4f18\u7684\u9009\u62e9\uff0c\u5373\u5de6\u53f3\u9009\u62e9\u6216\u8005\u53f3\u9009\u62e9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/leetcode-cn.com\/problems\/longest-palindrom [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[10],"tags":[],"views":1505,"_links":{"self":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/2743"}],"collection":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/comments?post=2743"}],"version-history":[{"count":0,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/2743\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/media?parent=2743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/categories?post=2743"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/tags?post=2743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}